Abstract
This paper presents nonlinear simulation model of switched reluctance (SR) ocean current generator system on MATLAB/SIMULINK with describing the structure of generator system. The developed model is made up of main model, rotor position calculation module, controller module, gate module, power converter module, phase windings module, flux-linkage module, torque module, and power calculation module. The magnetization curves obtained by two-dimensional finite-element electromagnetic field calculation and the conjugated magnetic energy graphics obtained from the three-dimensional graphics of flux linkage are stored in the “Lookup Table” modules on MATLAB/SIMULINK. The hardware of the developed three-phase 12/8 structure SR ocean current generator system prototype with the experimental platform is presented. The simulation of the prototype is performed by the developed models, and the experiments have been carried out under the same condition with different output power, turn-off angle, and rotor speed. The simulated phase current waveforms agree well with the tested phase current waveforms experimentally. The simulated output voltage curves agree well with the tested output voltage curves experimentally. It is shown that the developed nonlinear simulation model of the three-phase 12/8 structure SR ocean current generator system is valid.
Highlights
DC generator, synchronous generator, and induction generator are used as ocean current generators
This paper presents for the first time the nonlinear simulation model of the developed switched reluctance ocean current generator system by MATLAB platform, which is Advances in Mechanical Engineering
The developed prototype consists of the three-phase 12/8 structure doubly salient poles reluctance generator, the three-phase asymmetric bridge power converter, and the controller, which could be applied to ocean current energy systems
Summary
DC generator, synchronous generator, and induction generator are used as ocean current generators now. There are two categories of synchronous generators, such as the electric excited synchronous generator and the permanent magnet synchronous generator It is difficult for the electric excited synchronous generator to manufacture the waterproof structure because of the electric excited winding on the rotor. It has advantages like its firm and durable structure, low manufacture cost, and easy maintenance It is suitable for harsh outdoor environment operation, and other types of generators cannot match its long-life operation. Integrated with the magnetization curves of switched reluctance generator calculated by the two-dimensional finiteelement electromagnetic field calculation, the nonlinear electrical network model of the power converter, and the excitation/commutation control algorithms. The developed prototype consists of the three-phase 12/8 structure doubly salient poles reluctance generator, the three-phase asymmetric bridge power converter, and the controller, which could be applied to ocean current energy systems
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